Synopsis Shin Jung Hoo leads a new generation of criminal investigators that use forensic procedures and scientific methods to solve mysterious crimes, with a new focus on criminal psychology and profiling: Cha Gun Woo, a profiling expert who uses his good looks and natural charm to appeal to females and elicit testimony, the rookie investigator Seo Yeon Doo, veteran Choi Do Gon, and coroner Park Choong Ok.